阅读说明：本技术 一种共室分时点火输出的双脉冲燃发器 (Double-pulse igniter with common-chamber time-sharing ignition output ) 是由 虞国军 郝雪杰 常江 于 2019-10-08 设计创作，主要内容包括：本发明公开了一种共室分时点火输出的双脉冲燃发器,其中,一级装药和二级装药串联安装于壳体部件内,一级点火组件安装于壳体部件上并与一级装药配合连接,二级点火组件安装于壳体部件上并与二级装药配合连接,一级装药与二级装药采用隔层部件分隔于两个独立燃烧单元内,一级装药与壳体部件的排气口之间设置有单向阀部件；壳体部件的密封端采用卡环部件将端盖部件固定于壳体部件上实现密封。通过本发明的技术方案,提高了空间利用率,进而增大了装药量,实现了对储气装置气量的动态补偿,有效避免了充气不足或超压,提高了点火产气的可靠性,且具有结构紧凑合理、安装简单、拓展应用灵活的优点。(The invention discloses a double-pulse hair burner capable of realizing co-chamber time-sharing ignition output, wherein a primary charge and a secondary charge are installed in series in a shell component, a primary ignition assembly is installed on the shell component and is in matched connection with the primary charge, a secondary ignition assembly is installed on the shell component and is in matched connection with the secondary charge, the primary charge and the secondary charge are separated in two independent combustion units by adopting an interlayer component, and a one-way valve component is arranged between the primary charge and an exhaust port of the shell component; the sealing end of the housing member is sealed by securing the end cap member to the housing member with a snap ring member. By adopting the technical scheme of the invention, the space utilization rate is improved, the charging amount is increased, the dynamic compensation of the air quantity of the air storage device is realized, the insufficient inflation or overpressure is effectively avoided, the reliability of ignition gas production is improved, and the invention has the advantages of compact and reasonable structure, simplicity in installation and flexibility in expanding and applying.)

1. A kind of common chamber time sharing ignites the double pulse igniter of the output, characterized by that, comprising: the ignition device comprises a shell component, a primary charge, a secondary charge, a primary ignition assembly, a secondary ignition assembly, a one-way valve component, an interlayer component and an end cover component;

the primary charging part and the secondary charging part are installed in the shell part in series, the primary ignition assembly is installed on the shell part and is in matched connection with the primary charging part, the secondary ignition assembly is installed on the shell part and is in matched connection with the secondary charging part, the primary charging part and the secondary charging part are separated into two independent combustion units by adopting the interlayer part, and the one-way valve part is arranged between the primary charging part and an air outlet of the shell part;

and the sealing end of the shell component adopts a clamping ring component to fix the end cover component on the shell component to realize sealing.

2. The co-chamber time-sharing ignition output double-pulse igniter according to claim 1, wherein the primary ignition assembly comprises an ignition cable, an electric igniter, a primary initial cavity and an ignition medicine box I, the ignition cable is connected with the electric igniter, the electric igniter is mounted on the housing component and forms a fire transmission channel, the ignition medicine box I is fixed between the primary charge and the one-way valve component, the primary initial cavity is formed between the primary charge and the ignition medicine box I, and the fire transmission channel is communicated with the primary initial cavity; the volume of the primary initial cavity is not more than 10 ml.

3. The co-chamber time-sharing ignition output double-pulse igniter according to claim 2, wherein the secondary ignition assembly comprises an ignition cable, an electric igniter, a relay explosive box, a secondary initial cavity and an ignition explosive box II, the ignition cable is connected with the electric igniter, the electric igniter is mounted on the housing component and forms a relay channel, the relay explosive box is mounted in the relay channel, the ignition explosive box II is fixed between the secondary charge and the interlayer component, the secondary initial cavity is formed between the secondary charge and the ignition explosive box II, and the relay channel is communicated with the secondary initial cavity; the secondary initial volume is no more than 25 ml.

4. The co-chamber time-sharing ignition output double-pulse igniter according to claim 1, wherein the housing component comprises a thin-wall cylinder, a flange end socket and a heat insulation layer I, the flange end socket is fixed on one end of the thin-wall cylinder close to the exhaust port by vacuum electron beam welding, the heat insulation layer I is arranged on the inner wall of the thin-wall cylinder, and the flange end socket is communicated with an external gas storage device through an exhaust channel.

5. The co-chamber time-sharing ignition output double-pulse igniter according to claim 4, wherein the thin-wall cylinder and the flange end enclosure are made of alloy structural steel 30CrMnSi through tempering, quenching and tempering and processing, the heat insulation layer I is composed of a pyrolysis layer and an ablation layer, the pyrolysis layer is formed by die pressing of a high silica phenolic product, and the thickness of the pyrolysis layer is gradually increased from 2mm to 4mm along the outlet direction of the flange end enclosure; the ablation layer is formed by die pressing of a carbon phenolic product and has the thickness of 0.5 mm.

6. The co-chamber time-sharing ignition output double-pulse igniter according to claim 1, wherein the check valve component comprises a pressing screw, a heat insulation sleeve, a membrane and a porous plate, the membrane is riveted with the porous plate and is arranged in the heat insulation sleeve to form an integral structure, the integral structure is arranged in the pressing screw and is connected with an internal thread of the flange end socket through a thread, the pressing screw is pre-tightened at a joint of the heat insulation sleeve and the flange end socket to form a sealing surface, and the forward conduction pressure of the check valve component is 6-8 MPa;

the diaphragm is preset with a cross groove defect, the ratio of the groove depth to the bottom plate thickness is 1/4-1/3, and the material is industrial pure aluminum 1035;

the heat insulation sleeve is provided with a cross-shaped groove defect in advance, the bottom of the heat insulation sleeve is 2.5mm in thickness, the groove depth is 1mm, and the heat insulation sleeve is made of 824 flexible ablation-resistant materials;

the aperture ratio of the porous plate is 25-35%, the thicknesses of the solid parts are all equal and are 1.5mm, and the porous plate is made of W-7 Cu;

and a round hole with the diameter of 1.9mm is arranged in the pressing screw, so that constant-pressure and timed output of the combustion unit is maintained.

7. The co-chamber time-sharing ignition output double-pulse igniter according to claim 3, wherein the primary charge and the secondary charge are both made of a standard double-base propellant, namely copper lead diacetate-2, a coating layer is made of ethylene propylene diene monomer rubber with the thickness of 2mm, the coating layer is removed from the bottom of the primary charge, a prefabricated rubber bottom with the thickness of 3mm is filled in the bottom of the primary charge, and the ignition medicine box I, the ignition medicine box II and the relay medicine box are all internally provided with a high-energy pyrotechnic agent, namely boron/potassium nitrate ignition medicine BPN-D3, and are wrapped by a nitro-soft sheet with the thickness of 0.15mm and are formed in a rolling mode.

8. The co-chamber time-sharing ignition output double-pulse igniter according to claim 1, wherein the interlayer part is in threaded connection with the shell part and is radially sealed by an O-shaped sealing ring I, the interlayer part comprises a framework, a metal membrane and a heat insulation pore plate, the metal membrane and the framework are welded into a whole by adopting vacuum argon arc welding, and the back of the metal membrane is vulcanized to form the heat insulation pore plate;

the framework is provided with a circumferential hole opening groove, the material is alloy structural steel 30CrMnSi, and the quenching hardness is (35-40) HRC;

the aperture ratio of the bottom surface of the framework is 30-35%, and the thicknesses of the solid parts are all equal and 3 mm;

the thickness of the metal diaphragm is 0.5mm, the material is alloy structural steel 30CrMnSi, the hardening and tempering hardness is (28-32) HRC, three grooves are prefabricated on the metal diaphragm, and the specifications are that the groove length is 30mm, the groove width is 1mm and the groove depth is 0.3 mm;

the interlayer part has reverse pressure bearing not lower than 50MPa and forward conducting pressure of 3-5 MPa.

9. The co-chamber time-sharing ignition output double-pulse igniter according to claim 1, wherein the snap ring component comprises a wedge block, an expansion block and a set screw, the wedge block and the expansion block form an annular structure and are arranged in an annular groove arranged in the end cover component and an annular groove arranged in the shell component, the expansion block and the end cover component are fixedly connected through the set screw, and radial sealing is realized through an O-shaped sealing ring II;

the wedge-shaped block and the expansion block are made of alloy structural steel 30CrMnSi with quenching hardness (35-40) HRC.

10. A co-chamber time sharing ignition output dual pulse initiator according to claim 1, wherein said primary ignition assembly and said primary charge and said secondary ignition assembly and said secondary charge comprise a tertiary ignition sequence, and the exhaust port end of said housing member is in communication with an air reservoir.

Technical Field

The invention relates to the technical field of fuel gas generators, in particular to a double-pulse fuel gas generator with co-chamber time-sharing ignition output.

Background

The existing mature gas generator is mainly used for inflating an attitude and orbit control power system storage tank, boosting a propellant storage tank or driving a turbine, and is technically characterized by one-time charging, single starting and fixed gas output, wherein insufficient inflation or overpressure often occurs in the pressure building process, so that the dynamic compensation of temperature loss cannot be realized, and large high-frequency impact vibration is accompanied; in addition, single-chamber free filling is adopted, the filling mass ratio is low, and the requirement of the same gas production rate on larger space and weight is met, so that the application occasions of long endurance time, low overload, controllable output and limited space are difficult to meet.

Disclosure of Invention

Aiming at least one of the problems, the invention provides a double-pulse igniter with common-chamber time-sharing ignition output, which realizes two-stage matched charge by adopting two self-sealing combustion units with common-chamber series connection, independent two-way ignition units and a common output channel, thereby reasonably distributing gas production and working time, arbitrarily controlling interstage starting interval, improving space utilization rate, and having compact and reasonable structure, simple installation and flexible expansion and application.

In order to achieve the above object, the present invention provides a dual pulse igniter with a common chamber and a time-sharing ignition output, comprising: the ignition device comprises a shell component, a primary charge, a secondary charge, a primary ignition assembly, a secondary ignition assembly, a one-way valve component, an interlayer component and an end cover component; the primary charging part and the secondary charging part are installed in the shell part in series, the primary ignition assembly is installed on the shell part and is in matched connection with the primary charging part, the secondary ignition assembly is installed on the shell part and is in matched connection with the secondary charging part, the primary charging part and the secondary charging part are separated into two independent combustion units by adopting the interlayer part, and the one-way valve part is arranged between the primary charging part and an air outlet of the shell part; and the sealing end of the shell component adopts a clamping ring component to fix the end cover component on the shell component to realize sealing.

In the above technical scheme, preferably, the primary ignition assembly includes an ignition cable, an electric detonator, a primary initial cavity and an ignition cartridge i, the ignition cable is connected with the electric detonator, the electric detonator is mounted on the housing component and forms a fire transfer channel, the ignition cartridge i is fixed between the primary charge and the one-way valve component, the primary initial cavity is formed between the primary charge and the ignition cartridge i, and the fire transfer channel is communicated with the primary initial cavity; the volume of the primary initial cavity is not more than 10 ml.

In the above technical solution, preferably, the secondary ignition assembly includes an ignition cable, an electric initiator, a relay box, a secondary initial cavity, and an ignition box ii, the ignition cable is connected to the electric initiator, the electric initiator is mounted on the housing component and forms a relay channel, the relay box is mounted in the relay channel, the ignition box ii is fixed between the secondary charge and the interlayer component, the secondary initial cavity is formed between the secondary charge and the ignition box ii, and the relay channel is communicated with the secondary initial cavity; the secondary initial volume is no more than 25 ml.

In the above technical scheme, preferably, the housing component includes a thin-wall cylinder, a flange seal head and a heat insulation layer i, the flange seal head is fixed to one end of the thin-wall cylinder, which is close to the exhaust port, by means of vacuum electron beam welding, the heat insulation layer i is arranged on the inner wall of the thin-wall cylinder, and the flange seal head is communicated with an external gas storage device through an exhaust passage.

In the technical scheme, preferably, the thin-wall cylinder and the flange end enclosure are made of alloy structural steel 30CrMnSi through tempering, quenching and tempering and processing, the heat insulation layer I is composed of a pyrolysis layer and an ablation layer, the pyrolysis layer is formed by die pressing of a high-silica phenolic product, and the thickness of the pyrolysis layer is gradually increased from 2mm to 4mm along the outlet direction of the flange end enclosure; the ablation layer is formed by die pressing of a carbon phenolic product and has the thickness of 0.5 mm.

In the above technical solution, preferably, the check valve component is composed of a pressing screw, a heat insulation sleeve, a membrane and a porous plate, the membrane is riveted with the porous plate, and is arranged in the heat insulation sleeve to form an integral structure, the integral structure is arranged in the pressing screw and is connected with an internal thread of the flange end enclosure through a thread, the pressing screw is pre-tightened at a joint of the heat insulation sleeve and the flange end enclosure to form a sealing surface, and the forward conduction pressure of the check valve component is 6 MPa-8 MPa; the diaphragm is preset with a cross groove defect, the ratio of the groove depth to the bottom plate thickness is 1/4-1/3, and the material is industrial pure aluminum 1035; the heat insulation sleeve is provided with a cross-shaped groove defect in advance, the bottom of the heat insulation sleeve is 2.5mm in thickness, the groove depth is 1mm, and the heat insulation sleeve is made of 824 flexible ablation-resistant materials; the aperture ratio of the porous plate is 25-35%, the thicknesses of the solid parts are all equal and are 1.5mm, and the porous plate is made of W-7 Cu; and a round hole with the diameter of 1.9mm is arranged in the pressing screw, so that constant-pressure and timed output of the combustion unit is maintained.

In the above technical scheme, preferably, the primary charge and the secondary charge are both standard double-base propellants, namely copper lead diacetate-2, the coating layer is ethylene propylene diene monomer with the thickness of 2mm, the coating layer is partially removed from the bottom of the primary charge and the prefabricated rubber bottom with the thickness of 3mm is filled in the bottom of the primary charge, and the ignition medicine box I, the ignition medicine box II and the relay medicine box are all internally provided with the high-energy pyrotechnic agent, namely boron/potassium nitrate ignition medicine BPN-D3 and are wrapped by nitro-soft sheets with the thickness of 0.15mm to be rolled and molded.

In the above technical solution, preferably, the interlayer part is in threaded connection with the housing part and is radially sealed by an O-ring seal i, the interlayer part includes a framework, a metal membrane and a heat insulation orifice plate, the metal membrane and the framework are welded by vacuum argon arc welding to form a whole, and the back is vulcanized to form the heat insulation orifice plate; the framework is provided with a circumferential hole opening groove, the material is alloy structural steel 30CrMnSi, and the quenching hardness is (35-40) HRC; the aperture ratio of the bottom surface of the framework is 30-35%, and the thicknesses of the solid parts are all equal and 3 mm; the thickness of the metal diaphragm is 0.5mm, the material is alloy structural steel 30CrMnSi, the hardening and tempering hardness is (28-32) HRC, three grooves are prefabricated on the metal diaphragm, and the specifications are that the groove length is 30mm, the groove width is 1mm and the groove depth is 0.3 mm; the interlayer part has reverse pressure bearing not lower than 50MPa and forward conducting pressure of 3-5 MPa.

In the above technical solution, preferably, the snap ring component includes a wedge block, an expansion block and a set screw, the wedge block and the expansion block form an annular structure and are disposed in an annular groove disposed in the end cover component and an annular groove disposed in the housing component, the expansion block and the end cover component are connected and fixed by the set screw, and radial sealing is achieved by an O-shaped seal ring ii; the wedge-shaped block and the expansion block are made of alloy structural steel 30CrMnSi with quenching hardness (35-40) HRC.

In the above technical solution, preferably, the primary ignition assembly and the primary charge and the secondary ignition assembly and the secondary charge form a tertiary ignition sequence, and the air outlet end of the casing component is communicated with an air storage device.

Compared with the prior art, the invention has the beneficial effects that: a common-chamber serial structure is adopted, and a common fuel gas conveying channel is utilized, so that the space utilization rate is improved, and the medicine loading amount is increased; two independent combustion units are formed by the interlayer parts, the charging and working time are matched as required, and the interval time of interstage starting is regulated and controlled randomly, so that the dynamic compensation of the air quantity of the air storage device is realized, and the insufficient inflation or overpressure is effectively avoided; two paths of ignition units are arranged on the two independent combustion units to form a redundant ignition sequence, so that the reliability of ignition and gas production is improved; the force-bearing part is connected through the clamping ring part, the space of a structural part is reduced, the connection strength is improved, the self-sealing performance of the double-pulse hair burner is realized through the O-shaped sealing ring and the welding structure, the adaptability of the application working condition is provided, and the double-pulse hair burner has the advantages of compact and reasonable structure, simplicity in installation and flexibility in expansion and application.

Drawings

FIG. 1 is a schematic longitudinal cross-sectional view of a co-chamber time-sharing ignition output dual pulse igniter disclosed in one embodiment of the invention;

FIG. 2 is a schematic diagram of a right-view structure of a dual pulse igniter with a common chamber and time-sharing ignition output according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view A-A of the embodiment of FIG. 1;

FIG. 4 is a schematic cross-sectional view B-B of the embodiment of FIG. 1;

FIG. 5 is a schematic cross-sectional view of an ignition cartridge I according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a one-way valve member according to one embodiment of the present invention;

FIG. 7 is a schematic perspective view of a diaphragm according to an embodiment of the present invention;

FIG. 8 is a schematic perspective view of a perforated plate according to an embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view of a spacer member according to an embodiment of the present invention;

FIG. 10 is a schematic perspective view of a skeleton according to an embodiment of the present invention;

FIG. 11 is a schematic perspective view of a metal diaphragm according to an embodiment of the present invention;

fig. 12 is a perspective view of a clip member according to an embodiment of the present invention.

In the drawings, the correspondence between each component and the reference numeral is:

1. the ignition device comprises a shell component, 101, a thin-wall cylinder body, 102, a flange seal head, 2, a heat insulation layer I, 3, a one-way valve component, 301, a press screw, 302, a heat insulation sleeve, 303, a membrane, 3031, a cross groove defect, 304, a porous plate, 3041, a porous plate solid, 4, an ignition medicine box I, 401, a boron/potassium nitrate ignition powder, 402, a nitro film, 5, a primary charge, 6, a partition component, 601, a framework, 6011, a framework solid, 6012, a circumferential open groove, 602, a metal membrane, 603, a heat insulation pore plate, 604, a circumferential weld joint, 7, an ignition medicine box II, 8, a relay medicine box, 9, a secondary charge, 10, an end cover component, 1001, an end cover, 1002, a heat insulation layer II, 11, a snap ring component, 1101, a wedge block, 1102, an expansion block, 12, an ignition cable, 1201, a plug, a twisted pair shield 1203, a cable, a socket, 13, a heat insulation body I, 14, 16, an O-shaped sealing ring II, 17, a set screw, 18, a copper pad, 19, an electric detonator, 20, a support lug, 21, a fire transfer channel, 22, a primary initial cavity, 23, a thread, 24, a relay channel, 25, a secondary initial cavity, 26, a matching surface, 27, a gas storage device, 2701, a heat insulator II, 28, a flexible graphite sealing ring, 29, a stud, 30, a self-locking nut and 31, and an exhaust channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The invention is described in further detail below with reference to the attached drawing figures:

as shown in fig. 1 to 4, the present invention provides a co-chamber time-sharing ignition output double pulse igniter, which includes: the ignition device comprises a shell component 1, a primary charge 5, a secondary charge 9, a primary ignition assembly, a secondary ignition assembly, a one-way valve component 3, an interlayer component 6 and an end cover component 10, wherein the primary charge 5 and the secondary charge 9 are installed in the shell component 1 in series, the primary ignition assembly is installed on the shell component 1 and is connected with the primary charge 5 in a matched manner, the secondary ignition assembly is installed on the shell component 1 and is connected with the secondary charge 9 in a matched manner, the primary charge 5 and the secondary charge 9 are separated into two independent combustion units by the interlayer component 6, and the one-way valve component 3 is arranged between the primary charge 5 and an exhaust port of; the sealed end of the housing member 1 is sealed by fixing the cover member 10 to the housing member 1 with a snap ring member 11.

In the embodiment, two-stage matching charging is realized by adopting two self-sealing combustion units which are connected in series in a common chamber, have independent double-path ignition units and have a common output channel, so that the gas production and the working time are reasonably distributed, the interstage starting interval is randomly controllable, the space utilization rate is improved, and the device has the advantages of compact and reasonable structure, simplicity in installation and flexibility in expanding and applying.

Specifically, after the primary ignition assembly is ignited, the primary charging 5 burns to conduct the unidirectional valve part 3 to complete exhaust, and after the secondary ignition assembly is ignited, the secondary charging 9 burns to conduct the interlayer part 6 to complete exhaust, so that the two combustion units respectively adopt independent ignition units and adopt the same output channel, the space utilization rate is improved, the gas production rate and the working time can be reasonably distributed, and the interstage starting interval can be controlled arbitrarily. Further, the primary charge 5 and the prefabricated rubber bottom 14 form a whole and are arranged between the inner step of the heat insulation layer I and the end face of the interlayer part 6. The end cover component 10 consists of an end cover 1001 and a heat insulation layer II 1002, and the secondary charge 9 is arranged at the guide cylinder of the end cover component 10 and the inner step of the interlayer component 6. The design mode of series connection and common chamber makes the whole double-pulse hair burner compact and reasonable in structure, simple in installation and capable of flexibly realizing expansion and application. According to the double-pulse fuel generator with the co-chamber time-sharing ignition output, the problems of single charge, poor fixed output controllability, low space utilization rate and the like of the traditional fuel generator are effectively solved.

In the above embodiment, preferably, the housing component 1 includes a thin-walled cylinder 101, a flange seal head 102 and a heat insulation layer i 2, the flange seal head 102 is fixed to one end of the thin-walled cylinder 101 close to the exhaust port by vacuum electron beam welding, the heat insulation layer i 2 is disposed on the inner wall of the thin-walled cylinder 101, and the flange seal head 102 is communicated with the external air storage device 27 through the exhaust channel 31.

In the above embodiment, preferably, the thin-wall cylinder 101 and the flange seal head 102 are made of alloy structural steel 30CrMnSi through tempering, quenching and tempering, and then are processed, the heat insulation layer i 2 is composed of a pyrolysis layer and an ablation layer, the pyrolysis layer is formed by die pressing of a high-silica phenolic product, and the thickness of the pyrolysis layer is gradually increased from 2mm to 4mm along the outlet direction of the flange seal head 102; the ablation layer is formed by die pressing a carbon phenolic product and has the thickness of 0.5 mm. Further, the flange seal head 102 and the gas storage device 27 are respectively lined with a heat insulator I13 and a heat insulator II 2701. The heat insulator I13 and the heat insulator II 2701 are processed by high silica phenolic aldehyde laminated bars, and the thickness is 2 mm. Furthermore, the thin-wall cylinder 101 is also provided with a 4-phi 6.2 support lug 20 for connecting and fixing with an external structure, so that the expansion and application are flexible.

In the above embodiment, specifically, the gas storage device 27 is uniformly provided with 6-M6 screw holes and an annular tenon table, the flange seal head 102 is connected with the gas storage device 27 through the 6-M6 stud 29 and the 6-M6 self-locking nut 30, and the sealing groove of the matching surface 26 is internally provided with the flexible graphite sealing ring 28 for sealing. More specifically, the flange seal head 102 is provided with a flange hole of 6-6.2 mm, an exhaust channel 31 and a sealing groove, and is used for connecting the gas storage device 27 and inflating the gas storage device 27.

In the above embodiment, preferably, the primary ignition assembly includes an ignition cable 12, an electrical detonator 19, a primary initial cavity 22 and an ignition cartridge i 4, the ignition cable 12 is connected with the electrical detonator 19, the electrical detonator 19 is mounted on the housing component 1 and forms a fire transfer channel 21, the ignition cartridge i 4 is fixed between the primary charge 5 and the one-way valve component 3 by an iron anchor 101 through adhesive bonding, the primary initial cavity 22 is formed between the primary charge 5 and the ignition cartridge i 4, and the fire transfer channel 21 is communicated with the primary initial cavity 22; the primary initial volume 22 is no greater than 10 ml.

In the above embodiment, preferably, the secondary ignition assembly includes an ignition cable 12, an electric initiator 19, a relay box 8, a secondary initial cavity 25 and an ignition box ii 7, the ignition cable 12 is connected to the electric initiator 19, the electric initiator 19 is mounted on the housing component 1 and forms a relay channel 24, the relay box 8 is mounted in the relay channel 24, the ignition box ii 7 is adhesively fixed between the secondary charge 9 and the interlayer component 6 by using an iron anchor 101, the secondary initial cavity 25 is formed between the secondary charge 9 and the ignition box ii 7, and the relay channel 24 is communicated with the secondary initial cavity 25; the secondary initial volume 25 is no more than 25 ml.

In the above embodiment, the ignition cable 12 is composed of a KZ038-2A plug 1201, a twisted pair shielded cable 1202, and a KZ038-3 receptacle 1203. The electrical detonator 19 is connected to the housing part 1 by means of a thread 23, the end face sealing being achieved by means of a copper gasket 18. More specifically, the electric initiator 19 is preferably a class B or higher insensitive electric initiator.

In the above embodiment, as shown in fig. 5, preferably, the primary charge 5 and the secondary charge 9 are both made of a standard biradical propellant, namely copper lead diacetate-2, and the coating layer is ethylene propylene diene monomer rubber with the thickness of 2mm, the igniter kit i 4, the igniter kit ii 7 and the relay kit 8 are all filled with a high-energy pyrotechnic agent, namely boron/potassium nitrate ignition powder 401, the chemical code of which is BPN-D3, and are wrapped by a nitro film 402 with the thickness of 0.15mm to be formed by rolling. Further specifically, the ignition medicine box I4, the ignition medicine box II 7 and the relay medicine box 8 are all formed by dissolving and bonding industrial acetone, the whole ignition medicine box is immersed in water after being solidified, the water is kept for 5min, and the ignition medicine box is qualified if no water seepage occurs.

In the embodiment, the primary charge 5 is axially limited between the inner step of the insulation layer I2 and the end surface of the interlayer part 6, and the secondary charge 9 is axially limited at the guide cylinder of the end cover part 10 and the inner step of the interlayer part 6. The bottom of the primary charge 5 is processed with a hole with the diameter of 45mm to remove the original coating, and the preformed rubber bottom 14 is filled by ethyl cellulose solution, and the thickness is preferably 3 mm.

As shown in fig. 6 to 8, in the above embodiment, preferably, the check valve member 3 is composed of a press screw 301, a heat insulating sleeve 302, a membrane 303 and a porous plate 304, the membrane 303 is riveted with the porous plate 304, is placed in the heat insulating sleeve 302 and constitutes an integral structure, the integral structure is placed inside the press screw 301 and is connected with the internal thread of the flange seal 102 through a thread, and a sealing surface is formed at the joint of the heat insulating sleeve 302 and the flange seal 102 by the press screw 301 under pretension. Further, the forward conduction pressure of the check valve member 3 is 6MPa to 8 MPa.

In the above embodiment, the diaphragm 303 is preferably provided with a cross-shaped groove defect 3031, the ratio of the groove depth to the bottom plate thickness is 1/4-1/3, and the material is preferably industrial pure aluminum 1035. Furthermore, the heat insulation sleeve 302 is preset with a cross-shaped groove defect, the bottom thickness is 2.5mm, the groove depth is 1mm, and the material is preferably 824 flexible ablation-resistant material. Furthermore, the aperture ratio of the porous plate 304 is 25% to 35%, the thickness of the solid 3041 of the porous plate is 1.5mm, and the material is preferably W-7 Cu. Furthermore, a circular hole with the diameter of 1.9mm is arranged in the pressing screw 301, so that constant-pressure and timed output of the combustion unit is maintained.

In the above embodiment, as shown in fig. 9 to 11, preferably, the barrier member 6 is disposed between two independent combustion units, and the barrier member 6 is screwed to the housing member 1 and is sealed radially by the O-ring i 15 to ensure physical isolation of the two combustion units. Specifically, the interlayer part 6 comprises a framework 601, a metal membrane 602, a heat insulation pore plate 603 and a circumferential weld 604, wherein the metal membrane 602 and the framework 601 are welded into a whole by vacuum argon arc welding, and the back of the metal membrane is vulcanized to form the heat insulation pore plate 603. Furthermore, the framework 601 is provided with a circumferential perforated groove 6012, the specification is preferably 6-20 × 6, the material is preferably alloy structural steel 30CrMnSi, and the quenching hardness is (35-40) HRC. Furthermore, the aperture ratio of the bottom surface of the framework 601 is 30-35%, and the thickness of the framework entity 6011 is 3 mm. Furthermore, the preferred thickness of the metal diaphragm 602 is 0.5mm, the preferred material is alloy structural steel 30CrMnSi, and the hardening and tempering hardness is (28-32) HRC. Furthermore, three uniformly distributed grooves are prefabricated on the metal diaphragm 602, and the specifications are preferably 30mm in groove length, 1mm in groove width and 0.3mm in groove depth. Furthermore, the reverse pressure bearing of the interlayer part 6 is not lower than 50MPa, and the forward conduction pressure is 3 MPa-5 MPa.

Specifically, the heat insulation hole plate 603 is preferably vulcanized and molded by adopting 824 flexible ablation-resistant materials, and the specific vulcanization conditions are as follows: pressurizing at 10 + -0.5 MPa and 150 + -10 deg.C, and maintaining for 3 hr.

As shown in fig. 12, in the above embodiment, preferably, the snap ring member 11 includes a wedge-shaped block 1101, an expansion block 1102 and a set screw 17, the wedge-shaped block 1101 and the expansion block 1102 form an annular structure and are placed in an annular groove arranged inside the end cover member 10 and an annular groove arranged inside the housing member 1, the expansion block 1102 and the end cover member 10 are connected and fixed through the set screw 17, and a radial seal is realized by an O-ring ii 16; the wedge-shaped block 1101 and the expansion block 1102 are made of alloy structural steel 30CrMnSi with quenching hardness (35-40) HRC. The preferred part of the wedge-shaped block 1101 is 23, and is formed by annular linear cutting, and the included angle is 15 degrees; the expansion block 1102 is preferably 1 part, and the included angle machining of the expansion block 1102 is adjustable to compensate the included angle deviation of the wedge block 1101.

In the above embodiment, the O-ring I15 and the O-ring II 16 are preferably 7-148V 8545 and 2-227F-SIL 70, respectively, to increase high-temperature sealability.

In the above embodiment, the primary ignition assembly and the primary charge 5 are preferably ignited, fired and exhausted in part in the following order: the ignition cable 12 supplies power (not less than 5 adc) → the electric detonator 19 → the fire transfer channel 21 → the primary initial cavity 22 gathers → the ignition medicine box i 4 ignites → the primary charge 5 burns → the one-way valve part 3 conducts → exhausts.

The secondary ignition component and the secondary charge 9 are partially ignited, conducted and exhausted in sequence: the ignition cable 12 supplies power (not less than 5A DC) → the electric detonator 19 → the relay channel 24 → the relay medicine box 8 → the secondary initial cavity 25 gathers → the ignition medicine box II 7 ignites → the secondary charge 9 burns → the interlayer part 6 conducts → the prefabricated rubber bottom 14 conducts → exhausts.

The two parts of combustion units, the first-stage charge 5, the ignition medicine box I4, the second-stage charge 9, the relay medicine box 8 and the ignition medicine box II 7 form a three-stage ignition sequence, the charge and working time can be matched as required, and the interval time of interstage starting can be adjusted and controlled at will, so that the dynamic compensation of the air quantity of the air storage device 27 is realized, and the insufficient or overpressure of inflation is effectively avoided. In addition, two paths of ignition units are arranged on the two independent combustion units to form a redundant ignition sequence, so that the reliability of ignition and gas production is improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.